2N4N

NMR structure for a 3-stranded parallel beta-sheet

• PDB DOI: https://doi.org/10.2210/pdb2N4N/pdb
• BMRB: 25673

• Classification: DE NOVO PROTEIN
• Organism(s): synthetic construct
• Mutation(s): No 


• Deposited: 2015-06-24 Released: 2015-10-28 
• Deposition Author(s): Kung, V.M., Cornilescu, G., Gellman, S.H.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Literature

Impact of Strand Number on Parallel beta-Sheet Stability.

Kung, V.M., Cornilescu, G., Gellman, S.H.

(2015) Angew Chem Int Ed Engl 54: 14336-14339

• PubMed: 26457984 
• DOI: https://doi.org/10.1002/anie.201506448
• Primary Citation of Related Structures:  
  2N4N, 2N6H, 2N6I


• PubMed Abstract: 
  

  We have examined whether parallel β-sheet secondary structure becomes more stable as the number of β-strands increases, via comparisons among peptides designed to adopt two- or three-stranded parallel β-sheet conformations in aqueous solution. Our three-strand design is the first experimental model of a triple-stranded parallel β-sheet. Analysis of the designed peptides by nuclear magnetic resonance (NMR) and circular dichroism (CD) spectroscopy supports the hypothesis that increasing the number of β-strands, from two to three, increases the stability of the parallel β-sheet. We present the first experimental evidence for cooperativity in the folding of a triple-stranded parallel β-sheet, and we show how minimal model systems may enable experimental documentation of characteristic properties, such as CD spectra, of parallel β-sheets.

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Organizational Affiliation: 

Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, WI 53706 (USA).

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 2.88 kDa 
• Atom Count: 205 
• Modelled Residue Count: 25 
• Deposited Residue Count: 25 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DESIGNED BETA SHEET	A	25	synthetic construct	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 10 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-10-28 
Deposition Author(s): Kung, V.M., Cornilescu, G., Gellman, S.H.

Revision History  

• Version 1.0: 2015-10-28
  Type: Initial release
  
• Version 1.1: 2016-02-03
  Changes: Database references
• Version 2.0: 2023-11-15
  Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations